Some T430s variants have a Thunderbolt controller wired to PCIe port
The controller hotplugs itself to the chipset when a downstream device
is hotplugged into it, so the hotplug capability should be enabled on
PCIe port #5.
TODO: find the correct gpio pin to detect the Thunderbolt controller
at runtime.
There are 3 variants of mainboard for Thinkpad T430s: Basic type
(Wistron LSN-4 11263-1), Boards with an additional discreet GPU,
Boards with an additional TB controller (Wistron LSN-4 11271-1),
each of which has a different schematic.
The gpio27 on the last type is set as set as GPIO-INPUT, compared
with GPIO-OUTPUT-HIGH on the basic type boards.
Change-Id: I61f41db100f398069e50e2da8a378b3a8d1c84bf
Signed-off-by: Bill XIE <persmule@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/31631
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
0ffdeef681